Pick out the wrong statement ?

Related Mcqs:

1. Pick out the wrong statement. A. The conversion for a gas phase reaction increases with decrease in pressure, if there is an increase in volume accompanying the reaction________________?

   B. With increase in temperature, the equilibrium constant increases for an exothermic reaction
   C. The equilibrium constant of a reaction depends upon temperature only
   D. The conversion for a gas phase reaction increases with increase in pressure, if there is a
   decrease in volume accompanying the reaction

2. Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 ⇌ PCl3 + Cl2.Degree of dissociation of PCl5 will_________________?

   A. Decrease on addition of Cl2
   B. Increase on addition of an inert gas at constant pressure
   C. Decrease on increasing the pressure of the system
   D. None of these

3. Pick out the wrong statement ?

   A. Minimum number of degree of freedom of a system is zero
   B. Degree of freedom of a system containing a gaseous mixture of helium, carbon dioxide and
   hydrogen is 4
   C. For a two phase system in equilibrium made up of four non-reacting chemical species, the
   number of degrees of freedom is 4
   D. Enthalpy and internal energy change is zero during phase change processes like melting,
   vaporisation and sublimation

4. Pick out the wrong statement ?

   A. Cold cracking of a weld is due to the presence of hydrogen gas in the weld
   B. True stress is given by, ζ = ζE (1 + εE), where ζE and εE are engineering stress and
   engineering strain respectively
   C. Phosphorous can be easily recovered in the iron blast furnace
   D. High residual stress at the surface is beneficial for fatigue properties of a material

5. Pick out the wrong statement ?

   A. For a pressure vessel to be classified as ‘thin vessel’, the ratio of wall thickness to mean radius
   is less than 0.1
   B. For calculating forces and efficiency of riveted joint, either rivet diameter or rivet hole
   diameter is used in case of pressure vessel and in structural work
   C. Longitudinal joint is normally made butt joint to maintain the circularity of the vessel
   D. Maximum diameter of the opening provided in a pressure vessel, which does not require any
   compensation is 200 mm

6. Pick out the wrong statement ?

   A. A soft magnetic material should have high permeability and small area of hysteresis loop
   B. Poisson’s ratio of high melting point metals is more than unity
   C. Solders generally melt at less than 185°C
   D. Steel produced by B.O.F process is ideally suited for manufacturing flat product

7. Pick out the wrong statement ?

   A. Weldability of high carbon steel is poorer compared to low carbon steel
   B. Invar is a magnetic alloy
   C. Magnetic permeability of the diamagnetic material is less than one
   D. Martenistic transformation never goes to completion (i.e., 100%) at room temperature

8. Pick out the wrong statement_________________?

   A. Phase rule variables are intensive properties
   B. Heat and work are both state function
   C. The work done by expansion of a gas in vacuum is zero
   D. CP and CV are state function

9. Pick out the wrong unit conversion of mass transfer co-efficient?

   A. 1 lb/hr.ft3.atm. = 4.8182 kg/hr.m2.bar
   B. 1 kg/hr.m2.atm= 0.98687 kg/hr. m .bar
   C. 1 lb/hr.ft2 = 4.8823 kg/hr.m2
   D. 1 kg/hr.m2 = 4.8823 lb/hr.ft2

10. Pick out the correct statement?

    A. If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container,
    the temperature of the liquid will increase
    B. A process is irreversible as long as Δ S for the system is greater than zero
    C. The mechanical work done by a system is always equal to∫P.dV
    D. The heat of formation of a compound is defined as the heat of reaction leading to the
    formation of the compound from its reactants